1 Roughly chop the flowers, leaves and stems of the rose geranium and place with the marigold flowers and lavender flowerheads in a large glass bowl.
2 Bring the water to the boil and pour it over the flowers to make an infusion. Leave to infuse for 10 minutes, or until the water has taken on the colour of the flowers. Place the infusion, including the plant material, into a blender and whiz. Strain the mixture  through a piece of muslin into a clean bowl.
3 Now, in another bowl, dissolve the gelatine in 2 tbsp cold water. Gradually add the flower infusion, stirring to separate lumps. Add the vodka and tea tree oil, stirring until a gel is formed. Using a funnel, pour into a pot with a pump dispenser.
USE Apply to affected areas 2 times a day, or as frequently as needed.
STORAGE Keeps in the refrigerator for up to 6 weeks.